* {
  margin: 0;
  padding: 0;
  text-decoration: none;
}

ul {
  display: flex;
  justify-content: space-evenly;
  align-items: center;
  margin: 20px 0px;
  li {
    list-style: none;
    width: 120px;
    height: 40px;
    background-color: skyblue;
    border-radius: 5px;
    color: #fff;
    cursor: pointer;
    text-align: center;
    line-height: 40px;
    box-sizing: border-box;
  }
}


.boxItem {
  input {
    width: 100%;
    height: 35px;
  }
  .btn {
    display: flex;
    justify-content: center;
    button {
      width: 100px;
      height: 35px;
    }
  }
}

.preview {
  margin-top: 20px;
  min-height: 400px;
}

.redBorder {
  border: 1px solid red;
}